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Uncompleted Contracts - Costs in Excess of Billings (Details) - USD ($) $ in Thousands	Apr. 30, 2016	May 02, 2015
Contractors [Abstract]
Costs and estimated earnings in excess of billings	$ 30,200	$ 35,068
Billings in excess of costs and estimated earnings	(10,361)	(23,797)
Costs in excess of billings, net	$ 19,839	$ 11,271

X

- Definition

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
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- Definition

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings.

+ References

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Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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